谷歌 API :仪表动画

Google API : gauge animation

本文关键字：动画 仪表 API 谷歌      更新时间：2023-09-26

我正在尝试使谷歌仪表指针移动，但它没有移动，我已经设置了动画配置，因为它应该在var选项中设置，例如持续时间：1000和缓动："inAndOut"，我在谷歌API中是n00b，所以给我的无知尝试。

谁能帮我。这是我正在使用它的教程链接。代码正在工作，但部分地，仪表指针应该缓慢移动到最大值，但是，就我而言，它不起作用。这是代码。

<html>
<script type='text/javascript' src='https://www.google.com/jsapi'></script>
<script type='text/javascript'>
  google.load('visualization', '1', {packages:['gauge']});
  google.setOnLoadCallback(drawChart);
  function drawChart() {
    var data = google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      ['Match',80],
    ]);
    var options = {
      width: 440, height: 140,
      greenFrom: 70, greenTo: 100,
      yellowFrom:50, yellowTo: 70,
      redFrom:0, redTo: 50,
      minorTicks: 5,
      animation:{
          duration: 1000,
          easing: 'inAndOut',
        },
      majorTicks : ['0','10','20','30','40','50','60','70','80','90','100']
    };
    var chart = new google.visualization.Gauge(document.getElementById('chart_div<%=id%>'));
    chart.draw(data, options);
    clearChart();
  }
</script>
</html>

事实证明，我自己想通了这个，这里的谷歌论坛有一个很好的答案

诀窍是用 0（或任何最小值）开始仪表，然后稍后更新该值（使用 setInterval（） 或任何其他方法）

肯定有更好的方法来更新值，而不仅仅是编写一个新数组，但你明白了。

<html>
<script type='text/javascript' src='https://www.google.com/jsapi'></script>
<script type='text/javascript'>
  google.load('visualization', '1', {packages:['gauge']});
  google.setOnLoadCallback(drawChart);
  function drawChart() {
    var data = google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      ['Match',0],
    ]);
    var options = {
      width: 440, height: 140,
      greenFrom: 70, greenTo: 100,
      yellowFrom:50, yellowTo: 70,
      redFrom:0, redTo: 50,
      minorTicks: 5,
      animation:{
          duration: 1000,
          easing: 'inAndOut',
        },
      majorTicks : ['0','10','20','30','40','50','60','70','80','90','100']
    };
    var chart = new google.visualization.Gauge(document.getElementById('chart_div<%=id%>'));
    chart.draw(data, options);
    clearChart();
    // This is new.
    setTimeout(function(){
      var data = google.visualization.arrayToDataTable([
        ['Label', 'Value'],
        ['Match',80],
      ]);
      chart.draw(data, options);
    }, 200);
  }
</script>
</html>

不确定这现在是否会帮助任何人，但我发现使用 setValue 方法将我从静态针移动到动画针。下面是一个代码片段（我有许多仪表小部件，因此是数组）。

// set up the value here that we are moving from - this allows the gauge needle to animate when we set the actual value later
if (!widgetArray[i].googleArrayToDataTable) { // check if we've initialised
    widgetArray[i].googleArrayToDataTable = new google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      [widgetArray[i].label, 0]
    ]);
}
else {
    widgetArray[i].googleArrayToDataTable = google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      [widgetArray[i].label, (widgetArray[i].googleOldNeedleValue * widgetArray[i].dialMax / widgetArray[i].googleOldDialMax)]
    ]);
}
// remember these values - I need to do this for my application to ensure the needle looks ok when switching values
widgetArray[i].googleOldNeedleValue = widgetArray[i].needleVal;
widgetArray[i].googleOldDialMax = widgetArray[i].dialMax;
majorTickIncrement = widgetArray[i].dialMax / 5;
var options;
if (widgetArray[i].range2End > 0)
    options = {
        height: 240,
        animation: { duration: 1000, easing: 'inAndOut' },
        //redFrom: 0, redTo: KRAvalues.targetVal,
        redFrom: 0, redTo: widgetArray[i].range1End,
        yellowFrom: widgetArray[i].range1End, yellowTo: widgetArray[i].range2End,
        greenFrom: widgetArray[i].range2End, greenTo: widgetArray[i].range3End,
        minorTicks: 5, max: widgetArray[i].dialMax,
        majorTicks: ['0', majorTickIncrement, majorTickIncrement * 2, majorTickIncrement * 3, majorTickIncrement * 4, widgetArray[i].dialMax]
    };
else
    options = {
        height: 240,
        animation: { duration: 1000, easing: 'inAndOut' },
        minorTicks: 5, max: widgetArray[i].dialMax,
        majorTicks: ['0', majorTickIncrement, majorTickIncrement * 2, majorTickIncrement * 3, majorTickIncrement * 4, widgetArray[i].dialMax]
    };
if (!widgetArray[i].googleChart) { // initialise gauge if required
    widgetArray[i].googleChart = new google.visualization.Gauge(document.getElementById(widgetArray[i].name + 'chart_div'));
}
// this animates the needle
// draw old value
widgetArray[i].googleChart.draw(widgetArray[i].googleArrayToDataTable, options);
// set new value
widgetArray[i].googleArrayToDataTable.setValue(0, 1, widgetArray[i].needleVal);
// draw new value
widgetArray[i].googleChart.draw(widgetArray[i].googleArrayToDataTable, options);
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